Floor machine



May 23, 1950 H. w. LUNDQUIST FLOOR MACHINE 5 Sheets-Sheet 1 Filed Feb. 12, 1944 May 23, 1950 H. w. LUNDQUIST 2,508,411

FLOOR MACHINE Filed Feb. l2, 1944 3 Sheets-Sheet 2 ATTO/eh H. W. LUNDQUIST FLOOR MACHINE May 2 3, 195o I5 Sheets-Sheet 5 Filed Feb. 12, 1944 Patented May 23, 1950 UNITED STATES PATENT OFFICE4 FLOOR MACHINE Hendrik w. Lunaqulst, Tagungs, oeuf.

Application February 12, 1944, Serial No. 522,075

11 Claims.

- My invention relates to a oor machine, for sanding, scrubbing, and polishing floors.

One of the principal objects of :this invention is to provide a machine of this classwhich is compact and relatively silent in its operation.

Another .important object of this invention is to provide a floor machine in which the power for operating the sanding, scrubbing, and polishing elements is frictionally connected to these elements for operating the same.

An important object also of this invention to provide a novel mounting ofthe power unit for a frictionally driven machine of this class, whereby the power unit is yieldably connected tothe driven member in sucha manner that there is no undue wear or shock between the frictionally connected operating members.

L- A feature of this invention is to provide a novel structure for supporting the ultimate drive member and floor-operating implement.

Another novel feature of my invention is to provide a simple and rigid means of mounting the enclosing housing of my machine.

A further object of this invention is to provide a novelly constructed clutch for detachably connecting, sanding, scrubbing, or polishing elements or implements to the supporting and driving member.

A still further object of this invention is to provide such a clutch for connecting either right or left hand driven sanding, scrubbing, and polishing elements or implement.

Still another object of this invention is to provide either a single or a multiple flooroperating-element machine incorporating the aforementioned features.

With these and other objects in view, as will appear hereinafter, I have devised a oor machine having certain novel features of construction, combination, and arrangement of parts and portions, as will be hereinafter described in detail and particularly set forth in the appended claims, reference being had to the drawings, and to the characters of reference thereon, which form a part of this application, in which:

Fig. 1 is a fragmentary sectional elevational View of my oor machine in one form of construction, with the section taken through I-I of Fig. 2;

Fig. 2 is another fragmentary sectional elevation thereof taken through 2-2 of Fig. l;

Fig. 3 is a fragmentary view in plan, showing the motor mounting, taken through 3-3 of Fig. 1;

Fig. 4 is a transverse sectional view, taken through 4-4 of Fig. 2, showing the means of removably securing the sanding, scrubbing and polishing elements or implements to the supportlng and rotating member;

Fig. 5 is a sectional elevation of a oor machine, in a modiiied form, incorporating the features of my invention, the section being taken through 5 5 of Fig. 6; and,

Fig. 6 is a fragmentary sectional elevation thereof, taken through 6-8 of Fig. 5.

My machine, as shown in Figs. 1 and 2 is enclosed in a unitary housing I which is normally supported by or on the element or floor operati ing implement driven by the machine, such as the brush 2 shown in Figs. 1 and 2. The machine is moved over the floor by means of a handle 3. At one side of the housing is a wheeled carriage which consists of'a frame 4 and wheels 5. The frame 4 is pivotally connected to the housing I in such a manner that when the frame is swung downwardly and forwardly, the machine may be transported from place to place on wheels. When the machine is in use and rests on the floor by means of the brush, or one of the other elements or implements, the frame 4 may be swung upwardly so that the wheels 5 are out of the Way.

The motor II and drive elements I2 and I3 are enclosed within the housing. The motor, which is here shown as an electric motor, is carried on a U-shaped cradle I4, which is supported or suspended by its legs from the opposite side walls of the housing I by arms I41. Or the structure may be defined such that the houslng is supported on the ends of the arms I4a of the support. As shown, the motor rests directly upon the motor base I5 which is pivotally mounted at one side or end on a pair of lugs Mb at one end of the cross-portion I4c of the cradle I4. The axis of the pivot pin I6, which pivotally supports the motor base on the cradle, is parallel to the rotating axis of the motor. The free end of the base, or the end opposite the pivotal mounting, is supported by compression springs I'I located between the base and the opposite end of the cross-portion of the cradle. The base is secured relative to the cradle by means of a bolt IB and nuts I9. Compression springs 20 are positioned between the base and the nuts so .as resiliently to clamp the free end of the base upon the springs I'I.

The motor base I5 is also U-shaped, the same being provided with saddle-shaped legs I5, which embrace the journals Il* of the motor. The journals are secured in the saddles by straps 3 2i which extend over the upper portions of the journals.

The drive member I2 is mounted at one end of the shaft IIb of the motor. 'I'he contour of the drive member I2 is similar to a bevel pinion, while the contour of the corresponding or engaging surface I3n of the drive member I3 is shaped generally as the surface of a large bevel gear. This drive member I3 is cup shaped, and the lower portion of the cradle, the motor base,

' and the lower portion of the motor are located therein.

The drive member I3 has a downwardly extending boss I3 around which ilts the hub or backing plate 2* of the brush or other element 2.

Into this hollow boss I3b extends a stub shaft I4d which extends downwardly from the middle of the U-shaped portion of the cradle. The driven member I3 is centered and also carried by this stub shaft. Ball bearings I4 provide the mounting of the drive member I3, or the hollow boss I3b of the drive member, about the stub shaft. The ball bearings, and therefore, the

driven member I3, are retained on the stub shaft by a plate I4f secured to the end of the stub shaft.

The brush is secured to the bottom portion of the driven member I3 by a pair of clutch members 22 and 23. and both are provided with, preferably three, lingers. It will be noted however that each gripping portion of the clutch 22 is substantially T-shaped, the cross portion 22l thereof comprising a pair of opposed fingers, so as to receive the laterally extended portion of the ringer of the lower clutch member 23. If desired, the lower clutch member may also have T-shaped lingers forming pairs of opposed fingers, so that the brush, or other implement, may be secured to the driven member for rotating the brush, or the like, in opposite directions. A

It will be here further noted that the free ends of the fingers, that is, the lateral portions of the L-shaped fingers and the opposite ends of the cross portions of the T-shaped fingers, may be readily depressed, so as to take up wear and thereby cause the brush, or other implement, to be tightly secured to the upper clutch member and to the driven member I3.

In Figs. and 6 of the drawings, the housing 3l is made relatively long and narrow for the purpose of mounting two brushes or other implements 32 and 33. Both of the brushes are provided with drive members 34 and 35 which are rotated in opposite directions by a pair of friction drive members 36, one mounted on each end of the motor 31. In this instance, the motor base 33 is resiliently supported on a plate 39 which is secured over and seals the bottom of the housing 3|.

The driven or rotating members 34 and 33 are secured to the upper ends of shafts 4l which are rotatably mounted on vertical axes in journals 39 which are supported on and extend upwardly from the plate 33. In the journals are y ball bearings 4I which carry the shafts 4l. The

Both are substantially similar in Figs. 3 and 5. for variously adjusting the friction drive members 36, at the opposite ends of the motor, with respect to the driven friction members 34 and 3i.

Though I have shown and described a particular construction, combination, and arrangement of parts and portions, and certain modifications thereof, I do not wish to be limited to the same, but desire to include in the scope of my invention the construction, combination, and arrangement substantially as set forth in the appended claims.

I claim:

l. In a machine of the class described, a motor supDOrt. a motor mounted thereon, a drive member on the motor, a cup-shaped driven member, the support and motor being located within the driven member, the drive member operatively engaging the rim of thev driven member. said motor support having a depending shaft at its middle portion, the driven member being rotatably mounted about said shaft and retained thereby, and a floor implement carried by and depending from said driven member.

2. In a machine of the class described, a motor support, a motor mounted thereon, a drive member on the motor, a driven member operatively connected to the drive member, said motor support having a depending shaft at its middle portion, the driven member being rotatably mounted about said shaft and retained thereby, a floor implement carried by and depending from said driven member, said motor support having laterally extending arms, and a housing supported on said arms enclosing said motor and said driven member and positioned above said oor implement.

3. In a machine of the class described, a U- shaped motor support, a motor supported within the U-shaped portion of the support, a drive member on the motor, a cup-shaped driven member rotatably mounted around the U-shaped portion of the support, the cross-portion of the U- shaped support having a stub shaft extending downwardly from its middle portion, the axial portion of the driven member being rotatably mounted on and retained by said shaft, and g floor implement carried by and depending from the axial portion of said driven member.

4. In a machine of the class described. a U- shaped motor support, a motor supported within the U-shaped portion of the support, a drive member on the motor, a cup-shaped driven member rotatably mounted around the U-shaped portion of the support and supported at its axial portion from the middle and lower DOrtion of the support, a floor implement carried by and depending from the driven member, said U-shaped support having arms extending laterally from the upper ends of its legs, and a housing supported on the outer ends of the arms.

5. In a machine of the class described, a motor support, a. motor mounted thereon, a friction drive member on the motor, a cup-shaped driven member, the support and motor being located within the driven member, the` drive member frictionally engaging the rim of the drive member for rotating the same, said motor support having a depending shaft at its middle portion, the driven member being rotatably mounted about said shaft and retained thereby, and a floor implement carried by and depending from said driven member.

6. In a machine of the class described, a motor support, a motor resiliently mounted thereon, a

friction drive member on the motor, a friction driven member operatively and yleldingly connected to the drive member, said motor support having a depending shaft at its middle portion, the driven member being rotatably mounted about said shaft and retained thereby, and a floor implement carried by and depending from said driven member.

7. In a machine of the class described, a U- shaped motor support, a, motor supported within the U-shaped portion of the support, a friction drive member on the motor, a cup-shaped friction driven member rotatably mounted around the U-shaped portion of the support and supported from the support, the cup-shaped driven member having a friction surface at its brim operatively connected to said friction member, and a floor implement carried by and depending from the driven member.

8. In a machine of the class described, a U- shaped motor support, a motor resiliently supported within the U-shaped portion of the support, a friction drive member on the motor, a cup-shaped friction driven member rotatably mounted around the U-shaped portion of the support and supported at its axial portion from the middle and lower portion of the support, the cup-shaped driven member having a friction surface at its brim operatively and yieldingly connected to said friction member, and a floor implement carried by and depending from the driven member.

9. In a machine of the class described, a U- shaped cradle, a motor resiliently mounted in the depression of the cradle, a bevelled friction drive member on the shaft of the motor, a cupshaped friction driven member positioned around the cradle and provided at its brim with a bevelled friction surface, the friction member being resiliently urged in operative engagement with said surface, the middle portion of the cradle having a depending shaft, the axial portion of the driven member being rotatably supported on and by said shaft, and a floor implement secured to said driven member.

' 10. In a, machine of the class described, a U- shaped cradle, a motor positioned in the depression of the cradle and provided with a base, one

end of said base being pivotaily supported within the depression of the cradle, the opposite end of the base being resiliently secured to said cradle, a bevelled friction drive member on the shaft of the motor, a cup-shaped friction driven member positioned around the cradle and provided at its brim with a bevelled friction' surface, the friction member being resiliently urged in operative engagement with said surface, the driven member being rotatably supported on and by the lower portion of said cradle, and a floor implement secured to said driven member.

11. In a machine of the class described, a U- shaped cradle, a, motor positioned in the depression of the cradle, said motor having a base, one end of the base being pivotaily mounted on one end of the cross-portion of the cradle on an axis parallel to the motor axis, the opposite end of the base being resiliently secured to the opposite end of the cross-portion of the cradle, a bevelled friction drive member on the shaft of the motor, a cup-shaped friction driven member positioned around the cradle and provided at its brim with a bevelled friction surface, the friction member being resiliently urged in operative engagement with said surface, the driven member being rotatably supported on and by the lower portion of said cradle, and a floor implement secured to said driven member.

HENDRIK W. LUNDQUIST.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 837,502 Pongracz Dec. 4, 1906 1,299,990 Miller Apr. 8, 1919 1,526,882 Trimmer Feb. 17, 1925 1,650,690 Cavicchi Nov. 29, 1927 1,660,412 Braun Feb. 28, 1928 1,809,603 Reed June 9, 1931 2,103,311 Atkin Dec. 28, 1937 2,113,475 Faber Apr. 5, 1938 2,300,138 Steele Oct. 27, 1942 2,316,805 Overholser Apr. 20, 1943 

